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math.OA2025
McDuff superrigidity for group II factors
Juan Felipe Ariza Mejía, Ionuţ Chifan, Denis Osin +1
Developing new techniques at the interface of geometric group theory and von Neumann algebras, we identify the first examples of ICC groups whose von Neumann algebras are McDuf…
math.OA2025
W-superrigidity for property (T) groups with infinite center
Ionuţ Chifan, Adriana Fernández Quero, Denis Osin +1
We propose to study a natural version of Connes' Rigidity Conjecture that involves property (T) groups with infinite center. Utilizing techniques at the intersection of von Neumann…
math.OA2024
Wreath-like products of groups and their von Neumann algebras III: Embeddings
Ionut Chifan, Adrian Ioana, Denis Osin +1
For a class of wreath-like product groups with property (T), we describe explicitly all the embeddings between their von Neumann algebras. This allows us to provide a continuum of…